Oh, I got the point. Well, I am not sure that stress based design is common approach. I think that one possible way is to divide the wall section to small subareas. After that based on your stress diagram you may calculate (integrate) the resultant force for each subarea and put a proper...
Look for "Section cuts" in the analysis reference and in the help file. There are also some example problems (named A-Z) where you can see how to use the section cuts.
Does the log file give some info and/or error messages? Can you post here the .LOG file?
Did you activate all the DOF's? Or probably the construction is not geometrically stable?
You can read about the difference in the "SAP2000 analysis reference", chapter "Geometric nonlinearity" :) Also as I remember there is some info about that in the Help :)
Hi!
SAP2000 will assume the self weight of the element too (converted to mass). So you must check out the "Mass per unit volume" and "Weight per unit volume" in the material properties dialog box.
About the 3-directional mass movement... take a look at the image that I attach. I think that you...
Select the girder, then go to Assign --> Frame --> Insertion point, there you can choose for example the option 8 - "top center".
About the common joints. You can divide both the girder and the slab in several parts along the span. For example: select girder --> Edit --> Divide frame --> choose...